关键词: 桥梁工程, AR(P)模型, 挠变, 挠曲, 挠度

Abstract: In the engineering case of main girder construction of Hu ' men Bridge , the def1ection change of girder sections in basket cantilever should be controlled to prevent the f1exure development of bridge span from the required demand. Auto-regressive (P) [AR (P) J model was used to monitor the bridge girder , which could simulate the construction synchronized with measurement and prediction. And AR (P) model aimed to support timely adjustment of the corresponding construction plan , which could make the construction condition of cantilever close to its design condition. The analysis results show that the joining precision of main bridge girder satisfies the design criterion. And it is verified that the AR (P) model is of practicality and rigor in the monitoring of bridge construction.

Key words: bridge engineering, auto-regressive (P) model[AR (P) J def1ection change, flexure, def1ection